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प्रश्न
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
उत्तर
The person would hear echoes when talking in a bare room.
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संबंधित प्रश्न
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
Name any two objects which are good reflectors of sound.
State the laws of reflection of sound.
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?
Answer the following question in your own words.
What is an echo?
What is the minimum distance needed for an echo?
What is an echo?
To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.
Answer the following question in your own words.
What factors are important to get a distinct echo?
